Battery charger



FIG. 1 is a front perspective view of a battery charger;

FIG. 2 is a back bottom perspective view of the battery charger;

FIG. 3 is a top plan view of thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right elevational view thereof;

FIG. 6 is a left elevational view thereof;

FIG. 7 is a front elevational view thereof; and,

FIG. 8 is a back elevational view thereof.

We claim the ornamental design for a battery charger, as shown anddescribed.